The document provides an overview of different modal verbs and expressions used to express ability, advice, necessity, possibility, obligation, advisability, and speculation. It discusses the uses of modals in conditionals, passive voice, direct and indirect speech, and embedded questions. Key points include using "can" for present ability, "should" and "ought to" for advice, "have to" for necessity, "may", "might", and "could" for possibility, and conditionals to discuss real and unreal possibilities and their results.

1. ESCUELA : NOMBRES: COMMUNICATIVE GRAMMAR III FECHA: Lic. Paúl González T. ABRIL – AGOSTO 2009 Inglés